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空气的对流可以形成风,在火炉上方放上一片又薄又轻的纸片,纸片会向上飘动;滑翔机之所以能在天空中飞翔,也是受到了暖气流的作用。下面我们来做一个利用暖气流使风轮转动的热风轮。材料工具15瓦平底灯泡连圆木灯座一只,250mm铁丝一段,大头针一根,揿钮一粒,空可乐瓶一只,易拉罐底壳一块,502胶水一瓶。制作方法1.制作风轮:在易拉罐底壳上按图1画好(实线为剪切线、虚线为折线),剪下折好,并在它的圆心处装上揿钮。如果找不到易拉罐底壳,也可用直径60mm的圆卡纸替代。
The convection of the air can form a wind, placing a thin, light piece of paper above the stove, and the piece of paper will float upward. The reason why the glider can fly in the sky is also influenced by the flow of warm air. Now let’s make a hot-air wheel that makes use of the warm air to turn the wind wheel. Materials Tools 15-watt flat bulb with a wooden lamp holder, a 250mm wire, a pin, a button, a bottle of Cola, a piece of cans, 502 glue a bottle. Production methods 1. Making wind wheel: draw on the bottom shell of the cans according to Figure 1 (solid line for the cut line, the dotted line for the broken line), cut off the folded, and put in its center of the circle button. If you can not find the bottom of the cans, but also the diameter of 60mm round cardboard instead.